PCB-sdetect-3P rev 1.2 21.04.2015 Description PCB-sdetect-3P synchronous detector measures the voltage signal from the output of photodiode preamplifier and converts it to the DC voltage signal proportional to amplitude of voltage from input. PCB- sdetect-3P synchronous detector is optimized for work in a pulse mode, since in this mode the highest signal amplitude and STN ratio can be achieved. Features • Three independent channels for detection. One can connect three systems with drivers and preamplifiers and run them through the synchronous detector simultaneously. • Built-in power supply for preamplifiers. • Possibility of input polarity inversion using the appropriate jumper. In case of wrong polarity connection from photodiode preamplifier one can simply switch the input polarity inversion jumper. Main Characteristics Parameter Symbol Input Voltage (stabilized) Voltage Tolerance Power Consumption Input Current Preamplifier Supply Output Voltage Output Constant Voltage Signal, max Board Dimensions VSUPPLY Min. 11.4 -5 Values Typ. 12.6 +5 Unit 70 x 70 x 19 V % W A V V mm Symbol Pulse Mode Unit tAV 100 / 200 / 300 1x / 5x / 10x µs P ISUPPLY VPRES VOUTMAX 12.0 Max. 0.1 5 10 Adjustable Parameters Parameter Averaging Time Signal Gain Supported Operation Modes Single Data Pulse Duration Frequency Input Voltage Signal From Preamplifier, max www.roithner-laser.com Symbol Pulse Mode Unit tp f VIN 2 – 20 0.5 – 16 ±3 µs kHz V 1 PCB-sdetect-3P Layout Channel 1: 1. Averaging time adjustment jumper: (“1” - 100µs, “2” - 200µs, w/o jumper - 300µs). 2. Input polarity inversion jumper. 3. Signal input (from output of preamplifier) terminal block. 4. Power output terminal block (for preamplifier supply) (DC, unipolar, 5V). 5. Output signal gain adjustment jumper: (“1” – 5x gain, “2” – 10x gain, w/o jumper – 1x gain). 6. Signal output terminal block. 7. Synchronization input terminal block (from LED driver synchronization output). Channel 2: Independent channel with its own set of jumpers and terminal blocks. Channel 3: Independent channel with its own set of jumpers and terminal blocks. 8. Power input terminal block (DC, unipolar, +12V). www.roithner-laser.com 2 Operating Instruction 1. Connect preamplifier output wires with signal input terminal block (3) till tight fixation. If you use a photodiode with built-in preamplifier (PDxx-xxxxx-AMP series), then make a connection in the following way: • • Green cord – to the signal input “+” Yellow cord – to the signal input “0” Note! The polarity of connections must be observed. In case of alternative polarity connection between photodiode and photodiode preamplifier one can simply switch the input polarity inversion jumper (2). Note! To minimize noise we recommend screening the wires from preamplifier. 2. Connect +5V power output terminal block (4) with preamplifier power input unless external power supply for preamplifier is used. If you use a photodiode with built-in preamplifier (PDxx-xxxxx-AMP series), then make a connection in the following way: • • White cord – to the power output “+” Brown cord – to the power output “0” Note! If you use a standalone version of the preamplifier (PCB-preamp), make sure that the connection between the photodiode and the preamplifier is proper, safe and securely screened and take the abovementioned steps 1-2. Note! Pay your attention to the colours of the cords; actual colours may differ from ones pointed in the present manual, follow the instructions pointed in the technical data provided with the ordered photodiode with built-in preamplifier (PDxx-xxxxx-AMP). www.roithner-laser.com 3 3. Connect signal output terminal block with signal observing device (multimeter, oscilloscope or PC via ADC). 4. Connect wires from LED driver’s synchronization output with synchronization input terminal block (7). 5. Choose the needed averaging time and signal amplification with the help of the averaging time (1) and signal gain (5) jumpers of the PCB-sdetect-3P synchronous detector. 6. 7. If necessary, make all the connections of other boards (driver, thermocontroller, etc.) following the appropriate instructions manuals. Before turning them on, check the required connections and modes: Driver: • LED connection • Synchronisation with sync. detector • Pulse duration, frequency, current selection • External connections (if necessary) Thermocontroller: • Thermistor / PCB-driver-51 temperature observation block input connection • Thermocooler output connection • External connections (if necessary) 8. Turn on the PCB-sdetect-3P board connecting +12V power supply with power input terminal block (8).. Precautions Operation: Indoor operation only. Ingress Protection Rating IP00. © All Rights Reserved The above specifications are for reference purpose only and subjected to change without prior notice www.roithner-laser.com 4